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 Chemistry Questions

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Q:

The force that a neutron exerts on a proton inside an atom is:

A) Tidal force B) Gravitational force
C) Electrostatic force D) Nuclear force
 
Answer & Explanation Answer: D) Nuclear force

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Q:

The melting point of ice is ____ K.

A) 253.16 B) 263.16
C) 273.16 D) 283.16
 
Answer & Explanation Answer: C) 273.16

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Q:

The Chemical formula of Ammonium nitrate is ___________.

A) (NH2)2NO3 B) NH4NO3
C) NH4(NO3)2 D) NH2NO3
 
Answer & Explanation Answer: B) NH4NO3

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Q:

Which of the following acts as best adsorbent?

A) Charcoal B) Activated Charcoal
C) Activated Coconut Charcoal D) Carbon black
 
Answer & Explanation Answer: C) Activated Coconut Charcoal

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Q:

Alpha particles are ___________.

A) twice the mass of beta particles B) negatively charged
C) just like helium nuclei D) lower in ionizing power as compared to gamma rays
 
Answer & Explanation Answer: C) just like helium nuclei

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Q:

There are two elements-calcium (atomic number 20) and argon (atomic number 18). The mass number of both the elements is 40. They are therefore known as

A) isotones B) isochores
C) isobars D) isotopes
 
Answer & Explanation Answer: C) isobars

Explanation:

Isotopes-These  are  atoms  of  the elements  having  the  same  atomic number but different mass number.,  Isobars-These  are atoms of same mass number but different atomic  number.,  Isotones-These are  atoms  of  different  elements having same number of neutrons.

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Q:

A radio-active substance has a half life of six months. Three-fourth of the substance will decay in ______.

A) Six months B) Ten months
C) Twelve Months D) Twenty four months
 
Answer & Explanation Answer: C) Twelve Months

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Q:

Process of loosing electrons is known as _____.

A) oxidation B) reduction
C) radiation D) both oxidation and reduction
 
Answer & Explanation Answer: A) oxidation

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